Cover
| Cover | May 24, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 24, 2024 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-09712 |
| Entity Registrant Name | UNITED STATES CELLULAR CORPORATION. |
| Entity Central Index Key | 0000821130 |
| Entity Tax Identification Number | 62-1147325 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 8410 West Bryn Mawr |
| Entity Address, City or Town | Chicago |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60631 |
| City Area Code | 773 |
| Local Phone Number | 399-8900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Shares | |
| Title of 12(b) Security | Common Shares, $1 par value |
| Trading Symbol | USM |
| Security Exchange Name | NYSE |
| 6.25% Senior Notes Due 2069 | |
| Title of 12(b) Security | 6.25% Senior Notes Due 2069 |
| Trading Symbol | UZD |
| Security Exchange Name | NYSE |
| 5.50% Senior Notes Due 2070 | |
| Title of 12(b) Security | 5.50% Senior Notes Due 2070 |
| Trading Symbol | UZE |
| Security Exchange Name | NYSE |
| 5.50% Senior Notes Due 2070 | |
| Title of 12(b) Security | 5.50% Senior Notes Due 2070 |
| Trading Symbol | UZF |
| Security Exchange Name | NYSE |